Electrochemical determination of aminopyrene on glassy carbon electrode modified with multi-walled carbon nanotube–sodium dodecyl sulfate/Nafion composite film

• Glassy carbon electrode (GCE) modified with MWCNT–SDS/Nafion composite film.
• 1-Aminopyrene was determined using MWCNT–SDS/Nafion/GCE with high sensitivity and selectivity.
• Oxidation mechanism was studied by using cyclic voltammetry.

A glassy carbon electrode (GCE) modified with multi-walled carbon nanotube–sodium dodecyl sulfate/Nafion (MWCNT–SDS/Nafion) composite film was constructed and used to determine 1-aminopyrene (1-AP). The surface morphology of the MWCNT–SDS/Nafion film was characterized using scanning electron microscopy and electrochemical impedance spectroscopy. The electrochemical behavior of the 1-AP on the modified electrode was investigated using cyclic voltammetry and adsorptive differential pulse voltammetry. After optimization of analytical conditions, the electrode showed a linear response at 0.04–0.40, 0.40–40.0 and 40.0–160 nM and a detection limit of 0.02 nM.